drm/i915: Add cxsr toggle tracepoint
Add a tracepoint for observing changes in the cxsr state. The tracepoint
will dump out the frame and scanline counters for each pipe so that the
information can be compared with eg. plane update tracepoints.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170302171508.1666-18-ville.syrjala@linux.intel.com
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index ca81987..2537a03 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -16,6 +16,36 @@
/* watermark/fifo updates */
+TRACE_EVENT(intel_memory_cxsr,
+ TP_PROTO(struct drm_i915_private *dev_priv, bool old, bool new),
+ TP_ARGS(dev_priv, old, new),
+
+ TP_STRUCT__entry(
+ __array(u32, frame, 3)
+ __array(u32, scanline, 3)
+ __field(bool, old)
+ __field(bool, new)
+ ),
+
+ TP_fast_assign(
+ enum pipe pipe;
+ for_each_pipe(dev_priv, pipe) {
+ __entry->frame[pipe] =
+ dev_priv->drm.driver->get_vblank_counter(&dev_priv->drm, pipe);
+ __entry->scanline[pipe] =
+ intel_get_crtc_scanline(intel_get_crtc_for_pipe(dev_priv, pipe));
+ }
+ __entry->old = old;
+ __entry->new = new;
+ ),
+
+ TP_printk("%s->%s, pipe A: frame=%u, scanline=%u, pipe B: frame=%u, scanline=%u, pipe C: frame=%u, scanline=%u",
+ onoff(__entry->old), onoff(__entry->new),
+ __entry->frame[PIPE_A], __entry->scanline[PIPE_A],
+ __entry->frame[PIPE_B], __entry->scanline[PIPE_B],
+ __entry->frame[PIPE_C], __entry->scanline[PIPE_C])
+);
+
TRACE_EVENT(vlv_wm,
TP_PROTO(struct intel_crtc *crtc, const struct vlv_wm_values *wm),
TP_ARGS(crtc, wm),
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index dc85501..99e09f6 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -377,6 +377,8 @@ static bool _intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enabl
return false;
}
+ trace_intel_memory_cxsr(dev_priv, was_enabled, enable);
+
DRM_DEBUG_KMS("memory self-refresh is %s (was %s)\n",
enableddisabled(enable),
enableddisabled(was_enabled));